<template>
  <div class="goods_container">
    <el-card class="box-card">
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>商品分类</el-breadcrumb-item>
      </el-breadcrumb>

      <el-row class="add">
        <el-button type="primary"
                   @click="addCategories">添加分类</el-button>
      </el-row>

      <tree-table :data="catelist"
                  :columns="treeColumns"
                  :selection-type="false"
                  :expand-type="false"
                  show-index
                  index-text="#"
                  border
                  :show-row-hover="false">

        <template slot="isOk"
                  slot-scope="scope">
          <i class="el-icon-success"
             v-if="scope.row.cat_deleted === false"
             style="color: lightgreen ">
          </i>
          <i class="el-icon-error"
             v-else
             style="color: red ">
          </i>
        </template>
        <template slot="order"
                  slot-scope="scope">
          <el-tag size="mini"
                  v-if="scope.row.cat_level === 0">
            1级
          </el-tag>
          <el-tag type="success"
                  size="mini"
                  v-else-if="scope.row.cat_level === 1">
            2级
          </el-tag>
          <el-tag type="warning"
                  size="mini"
                  v-else>
            3级
          </el-tag>
        </template>
        <template slot="set"
                  slot-scope="scope">
          <el-button type="primary"
                     icon="el-icon-edit"
                     size="mini">
            编辑
          </el-button>
          <el-button type="danger"
                     icon="el-icon-delete"
                     size="mini">
            删除
          </el-button>
        </template>
      </tree-table>

      <el-pagination @size-change="handleSizeChange"
                     @current-change="handleCurrentChange"
                     :current-page="queryInfo.pagenum"
                     :page-sizes="[1, 2, 5, 10]"
                     :page-size="queryInfo.pagesize"
                     layout="total, sizes, prev, pager, next, jumper"
                     :total="total">
      </el-pagination>

      <el-dialog title="添加分类"
                 :visible.sync="showDialog"
                 @close="closeDialog"
                 width="30%">
        <el-form label-width="100px"
                 :model="addForm"
                 :rules="addFormRules"
                 ref="editFormRef"
                 class="demo-ruleForm">
          <el-form-item label="分类名称"
                        prop="cat_name">
            <el-input v-model="addForm.cat_name"></el-input>
          </el-form-item>
          <el-form-item label="父级分类：">
            <el-cascader expand-trigger="hover"
                         v-model="selectItem"
                         :options="selectList"
                         :props="cascaderProps"
                         @change="handleChange"
                         clearable
                         change-on-select></el-cascader>
          </el-form-item>
        </el-form>
        <span slot="footer"
              class="dialog-footer">
          <el-button @click="showDialog = false">取 消</el-button>
          <el-button type="primary"
                     @click="addCate">确 定</el-button>
        </span>
      </el-dialog>

    </el-card>
  </div>
</template>

<script>
export default {
  data () {
    return {
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      catelist: [],
      total: 0,
      treeColumns: [
        {
          label: '分类名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isOk'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'set'
        }
      ],
      showDialog: false,
      addForm: {
        cat_name: '',
        cat_pid: 0,
        cat_level: 0
      },
      addFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ]
      },
      selectList: [],
      selectItem: [],
      cascaderProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      }
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败！')
      }
      this.catelist = res.data.result
      // console.log(this.catelist)
      this.total = res.data.total
    },
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateList()
    },
    handleCurrentChange (newPage) {
      this.queryInfo.pagenum = newPage
      this.getCateList()
    },
    addCategories () {
      this.showDialog = true
      this.getSelectList()
    },
    async getSelectList () {
      const { data: res } = await this.$http.get('categories', {
        params: { type: 2 }
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取下拉列表数据失败')
      }
      this.selectList = res.data
      // console.log(this.selectList)
    },
    handleChange () {
      // console.log(this.selectItem)
      if (this.selectItem.length > 0) {
        this.addForm.cat_pid = this.selectItem[this.selectItem.length - 1]
        this.addForm.cat_level = this.selectItem.length
      } else {
        this.addForm.cat_pid = 0
        this.addForm.cat_level = 0
      }
    },
    addCate () {
      // console.log(this.addForm)
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('categories', this.addForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加分类失败')
        }
        this.$message.success('添加分类成功')
        this.getCateList()
        this.showDialog = false
      })
    },
    closeDialog () {
      this.$refs.editFormRef.resetFields()
      this.selectItem = []
      this.addForm.cat_pid = 0
      this.addForm.cat_level = 0
    }
  }
}
</script>

<style lang="less" scoped>
.goods_container {
  width: 85%;
}
.add {
  margin: 15px 0;
}
.el-pagination {
  margin-top: 15px;
}
</style>
